Femtosecond-laser electronic-excitation tagging velocimetry using a 267 nm laser

Research output: Contribution to journalArticle

Abstract

Femtosecond (fs)-laser electronic-excitation tagging velocimetry (FLEET) in a nitrogen flow field using a 267 nm laser was performed under the condition of fs-laser filamentation. The filamentous properties and their effects on velocity measurements were investigated and were compared with those of an 800 nm fs-laser. The results show that the required energy of the 267 nm laser pulse is as low as hundreds of μJ, and this is beneficial for reducing the potential perturbations to the flow flied. The filaments induced by the 267 nm laser are longer and thinner than are those induced by the 800 nm laser, which enlarges the velocity measurements region, and a precision of 1.3% was achieved.

Details

Authors
Organisations
External organisations
  • Tianjin University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Energy Engineering

Keywords

  • Femtosecond laser, Laser filamentantion, Velocity
Original languageEnglish
Pages (from-to)138-142
Number of pages5
JournalSensors and Actuators, A: Physical
Volume287
Publication statusPublished - 2019
Publication categoryResearch
Peer-reviewedYes